"Earlier, a Golden Grove man, 62, was killed at Callington when the BMW motorcycle he was riding was hit from behind by a Holden Commodore sedan as he travelled west along the Princes Highway, just before 6.30pm.
The man died at the scene.
Police want to speak with the driver or any passengers in a dark-coloured VR or VS Holden Commodore sedan with a missing taillight, which was at the scene but left before police arrived."